SURFACE-MODIFIED BIMETALLIC CATALYSTS - PREPARATION, CHARACTERIZATION, AND APPLICATIONS

被引：46
|
作者：
STYTSENKO, VD
机构：
[1] Topchiev Institute of Petrochemical Synthesis, Russian Academy of Science
来源：
APPLIED CATALYSIS A-GENERAL | 1995年 / 126卷 / 01期
关键词：
BIMETALLIC CATALYSTS; CHEMICAL SURFACE MODIFICATION; CHROMIUM (SUPPORTED); DEHYDROGENATION; HYDROGENATION; PALLADIUM (SUPPORTED); SILICON (SUPPORTED); NICKEL (SUPPORTED); SURFACE MODIFICATION; TIN (SUPPORTED);
D O I：
10.1016/0926-860X(95)00012-7
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The basic principles of the preparation of surface modified catalysts, the problems of characterization of the metals, and models describing their active surface are considered. The characteristics of surface transformations and the distribution of modifying elements are defined by the ratio of reactivity/diffusivity under the conditions of the surface modification. The state of the metals (Ni, Pd, Cr, Si, Sn) is characterized by using electron spectroscopy for chemical analysis, laser microprobe analysis, extended X-ray absorption fine structure, Mossbauer spectroscopy as well as magnetization and chemisorption. The high activity, selectivity, and tolerance to common poisons are demonstrated for catalysts based on supported nickel and palladium in hydrogenation and dehydrogenation reactions.
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页码：1 / 26
页数：26
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